Manufacture of paper rolls



July 19, 1932. ,a J. MULLIGAN MANUFACTURE OF PAPER ROLLS filed NOV. 17.1 928 m. u w u r Q Q l A. 2 m n.f... Q Q O L Q Q Ihn- 9..... n Q J o a on a U. uu+n. ||l Pil anni .|l. 3 5 2 FIG-.6

0U fOr/'7 ey Patented July 19, 1932 UNITED STATES PATENT o FFICE 1PATRICK J'. MULLIGAN, 0F GLEN OLDEN, PENNSYLVANIA, ASSIGNOR T0 SCOTTPAPER e COMPANY, A GORLPORATON OF PENNSYLVANIA MANUFACTURE O15"A PAPER`ROLLS applicati@ inea November 1'?,4 192s. serial Nt. 320,045.

The object of my invention is to provide a method and means for themanufacture of paper rolls having a tubular core, wherein the latter isformed of an integral portion of the paper making up the roll.

Heretofore, rolls of toilet paper having tubular cores have been made byemploying previously prepared cardboard tubes, placing the same upon thewinding bar by hand, and then attaching the paper web to the core whilebeing rotated. By my improvements, the employment of a cardboard tube or`any previously constructed tubular core is entirely dispensed with; andfor the purpose of providing a firm tubular center or core to the paperroll, I cause the initial portions of the roll adjacent to the Windingbar or mandrel to be united, by the application of paste or glue, into amulti-ply tube and thereafter continuing to wind the paper web to thefullsize of the roll without the appli-cation of adhesive.V

In putting my invention into practice, I may employ an ordinary slittingand perfo- Arating machine such as theretofore employed in connectionwith the making of rolls with cardboard tubular cores, but with certainlchanges comprising more particularly a cylindrical shaped mandrel orwinding bar andV adhesive applying means comprising a glue or paste pot,and a transfer roll for applying the adhesive from the pot to thesurface of the paper web while being rolled upon the mandrel; and` forlimiting the action of the paste applying means, I provide automaticdevices for bringing the paste applying means into action for alimitedperiod of time during the initial Vwinding and then removing thesame out of vcontact with the paper.

As a furtherrenement of the means employed, IV prefer to provide acollapsible winding bar or mandrel, the same being made hollow withradial perforations, and in communication with a source of vacuum during-the initial rotary motion in the making of the paper roll, whereby atthe start, the web ofy paper will be attached to the bar by suction andafter one or more revolutions have been made, the adhesive applyingmeans are brought into action-to insure the building up of the multi-plytubular core. i

My improvements will 4be n better understood by reference to thedrawing,in which: Fig. l is a vertical section of a roll making` machineembodying mylimprovements, Fig; 2 is an elevation of the'adhesive potand rolls for applying the adhesive to the paper; Fig. p

3 1s a transverse section 0f the same on line 3 3 of Fig. 2;" Fig. .4tis a verticalv sectionA showing the mandrel or winding bar with partlyformed rollsthereon, together with the means for supporting the mandrel;Fig. 5 is a transverse section 0f the mandrel, taken Online 5-5 of Fig.4;,and'Fig. 6 is an end View of one of the finished rolls of removedfrom the mandrel. Describing the machine at present 1 preferred incarryingmy improved method 'into operation, the following are 'themoreimportant features. 1s the supporting mandrel or shaft for theparent paper roll from which the commercial rolls are to be made.` Thisparentroll may be of sufficient width lto permit its web being slitlongitudinally to provide a plurality of narrower webs to besimultaneously wound mto commercial rolls, but my invention is alsoapplicable to the making of commercial rolls from narrower webs and I,therefore, do not restrict myself to the slitting and per# forating ofthe paper at wound into Vthe rolls; l, however, will.y describe theconstruction of the machine as commercially Vused in the practice of my;invention.

2 is the main frame and 3 the time it is being 'SQL slm

The paper web W, after leaving the parentA roll, a roll member 5constituting a part of the transverse perforating means, and .thenceunder the guide roll 7 to the slitter knives 9. thence over a guide rolll0, and finally tothe winding mandrel. f The perforator. comprises arotating shaft withfour radially arranged blades, which shaft is gearedVto re-k volve at a definite speed, so that the perforating blades 8aenter transverse grooves 5a iny the roll 5. These perforationsdo notsever the web, butV simply weaken the same along passes under a guideroll 6, thence aboutV Y Y gagement after the winding operation. Thepart11 isprovidedwith a Vsquare head 15 at transverse lines uniformly spacedalong the length of the web. n

The mandrel or winding bar 13 comprises two parts 11 and 12, each havinga diagonal surface which, when brought together, form a cylindricalmandrel as' will be vunderstood by reference to Figs. 4 and 5. Thesepartsy p may be held together by a dove-tail tongue of onepart fittinginto a corresponding longitudinal recess in the other part, as isclearly shown at 14 in Fig. 5. This construction will permit the mandrelyto be collapsed for disenone end,which is adapted to engage a suitabledriving Ameans 15m usually. of :a character knownas a frictional drive.The opposite P end/'of the other member'12 of the mandrelis Y providedwith a tubular journal 1 6, which may be Vjournalled ina bearing 17pivoted atv orV on a vertical axis at 17 a. Furthermore, the lmembers 11and 12 of the mandrel are made hollow andprovided with radial apertures11a and; 12a respectively, Furthermore, the communicating walls betweenthe y two parts 11y and 12Varealso perforated at14a. Y

fItwill be understood that the tubular shaft 16V of the mandrelpart`12is provided with a transverse lai'ierture 18 openinginto ahollow'journal 17 providing chamber about said opening-18 and havingranextension19 leadi'ngto a source of vacuum by which a. suction may beexerted throughthe parts11 andv 12 of the mandrel for'holding the freeend ofthe paper web to theinandrel v during the initial windingoperation and preliminary to' the application of ,thelad-hesive.,V Todisen'gagevthe mandrelfrom the machine,v it is only necessary to move itto the right (Fig. 4) to ydiseng'age the driving, end 15 and swingingsaid mandrel clear ofthe driving means 150:, and vthereafter withdrawingthe mandrel longitudinally from the bearing 17. Byv employing a vacuumfor initially holding the paper web to the mandrel, the adhesive or glueVto be applied to the Vpaper is prevented* from -getting upon themandrel itself, and

thereby attaching the paper roll to the mandrel; and thisis quiteimportant in com- T'he cementor glue may be applied-to the rotatingpaper Iweb during thefinitial rotation of the mandrel, and as aconvenientr means for accomplishing this purpose, I'have employedthefollowing instrumentalities: 20 is a glue pot, 21 is an adhesiveapplying roll forll-direct-ly :applying 'adhesive to ythe'paper web, andto prevent the adhesive spreading beyond the paper by `an excess of thesame, I prefer to .form theapplying roller 21 with points orVprojections 2lb from its outer surface,so .that the adhesive is appliedto the paper at a large number of points, each of which is more or lessisolated from the other,

^ portions. Y

Considering my invention from'the stand- 21a is la transfer roller whichextend-s. into the pot 2O and transfers adhesive from the otto thevpoints lorprojections on the roll 21 and which prints the adhesive inpoints or spots upon the paper web. VThe pot 2,0 is ar.- ranged to bemoved toward and from the mandrel 13, and to accomplish this, I supportthe pot upon a lever 22 having a pivot or fulcrum point 23. The.opposite end of the lever 22 is actuatedby a cam 24 which, when incontact with the lever, causes the pot to be raised and the adhesiveapplied to the aper web about the mandrel. y

The cam 24 is of such shape that it will hold the adhesive applyingmeans in operative relation to the mandrel and the paper web being actedon thereby during a given number of preliminary rotating movements lofthe mandrel, and thereafterv cause said means to remain out of actionduring the completion of the roll. rIhe cam 24 may be rotated by a wormand worm wheel 'gearing 25 which, in turn, may be driven by"a shaft l26,Vand said shaft driven from the shaft of cylinder 5 by suitable worm'and Vworm wheel gearing 27. In this manner, the roll 21 is Vmoved toapply adhesive-to the Yweb for a denite number of revolutions of theman? Fig, 6, showing an fend view application of the adhesive andfor-ming the roll of toilet paper proper.,V

As the core is formed from the web itself, there is no uncertainty "asto its location, as is the case where the tubular cores previously madehave to be positioned uponthe man-` drel, and, therefore, myinventionlends itself excellently to the manufacture of commercial rollswhere a number of said'rolls Yare simultaneously wound upon the same Ymandrel after the parent web has been split into'agplurality of webs oflesser width; *l

The character of the adhesiveemployed should be a quick dryingone, andthe amount' of paper required to make Ethe tubularstructure is about onehundred y.and 'twenty-live inches and the core may be thirty ply orther'eabout, but I do not limit myself to these'pro- 'point of economyin the manufacture of roll toilet paper, the making of the core in themanner herein described eliminates the following costly and troublesomefeatures heretofore existing; namely, the costly tube making machinery,the cost of special tube board, excessive quantities of glue and gluepreparing apparatus, tube choppers, tube board slitters, intricate tubeconveyors to roll machines, tube hoppers for containing the tubes forroll machines, and elimination of the operation of putting tubes onwinding bars by the roll machine operators. My invention further causesless Wear and tear on the winding bars or mandrels by eliminating thenecessity of placing the bars on end into supporting sockets extendingbelow the floor, and the elimination of the steel supporting floorsockets, also of the entire tube making and operating labor force, andin addition to the foregoing, the gain of the additional and cleanerfactory floor space due to the elimination of all machinery connectedwith the making and handling of the tube elements.

Furthermore, it will be manifest that the simplicity of the abovedescribed method forming the subject matter of this application enablesthe commercial production of roll toilet paper at a considerablyreducedcost and with a greater production.

No claim is made in this application to a roll of paper of the characterherein described as an article of manufacture, as the said inventionforms subject matter of a divisional application Serial N 0. 618,481,and filed June 21, 1932.

I have described my improved method and the article of manufactureproduced thereby in connection with apparatus which I deem to be bestsuited to the requirements of the invention and on account of economy ispreferred in commercial practice, but I do not restrict or conne myselfto the minor or secondary details either as to the method of procedureor the means employed in putting it into effect, as variations thereinmay be resorted to as matters for the skilled artisan without aVdeparture from the spirit of the invention.

Having now described my invention, what I claim and desire to secure byLetters Patent 1s:

1. In means for forming an integral core and roll of paper, thecombination of a mandrel upon which a web of paper is wound into a roll,with adhesive applying means movable toward and from the mandrel andhaving means for holding the said adhesive applying means in positionfor applying adhesive to the web of paper being wound upon the mandrel,whereby a limited quantity of the web may be wound upon itself inadhering relation to form a multiply core and the remainder of the Webcontinued to be Wound without adhesive about the said core,

and wherein further, the mandrel is provided with means for holding thebeginning of the vweb to itself during the initial rotation movementprior to the application of the adhesive,- whereby the mandrel isprotected against being cemented to the paper.

2. In' means for forming an integral core and roll of paper, thecombination of a mandrel upon which a web of paper is wound into a roll,with adhesive applying means movable toward and from the mandrel andhaving means for holding the said adhesive applying means in positionfor applying adhesive to the web of paper-being wound upon the mandrel,whereby a limited quantity of the web may be wound upon itself inadhering relation to form a multiply core and the remainder of the webcontinued to be Wound without adhesive about the said core, and whereinthe mandrel is made collapsible whereby it may be readily withdrawn fromthe finished paper roll, said mandrel provided with suction aperturesabout its circumference so that the paper web may be initially attachedto the mandrell to enclose the same beipre the adhesive is applied tothepaper we In testimony of which invention, I hereunto set my hand.

PATRICK J. MU'LLIGAN.

